SDA9489X Datasheet, PDF (36/102 Pages) List of Unclassifed Manufacturers – PIP IV Advanced SOPHISTICUS High-End Picture-In-Picture ICs

SDA 9489X
SDA 9589X
Preliminary Data Sheet
System Description
4.9.3
Character and Character Background Color
The character’s color is either same as frame color (CHRFRC) or the character appears
with a grey value programmable with CHRY.
The character’s background box is influenced by CHRBGON and CHRBGY. It can be
made transparent so that behind the characters the inset picture becomes visible.
Alternatively the semi-transparent mode can be chosen. At this mode the background
box contains the original picture content with reduced luminance value. This mode offers
a good trade-off between reduction of visible display area and character readability.
4.10
DA-Conversion And RGB / YUV Switch
SDA 9589X and SDA 9489X include three 7bit DA-converters. Brightness BRTADJ,
Contrast CONADJ and overall amplitude PKLR, PKLG, PKLB of the output signal are
adjustable. External RGB or YUV signals can be connected to the inputs IN1...3. By
forcing the FSW input to high-level these signals are switched to the outputs OUT1...3
while the internal signals are switched off. The FSW input signal is passed through to the
SEL output. The setting of RGBINS determines wether an RGB insertion is possible and
which source, the external picture or the PiP, gets priority.
RGBINS='10'
PIPON='1'
OSD
R/V
G/Y
B/U
OSD
SEL
RGBINS='11'
PIPON='1'
OSD
OSD
RGBINS='00'
PIPON='1'
RGBIN='1X'
PIPON='0'
OSD
OSD
PiP IV
RGB/VYU
FSW
OSD
OSD
Figure 4-19 Visualization of RGB/YUV insertion
The external RGB or YUV signals are each clamped to the reference levels of the DACs
to force uniform black levels in each channel. The clamping needs careful adjustment
especially for VGA applications. The position and the length of the blanking pulse as well
as the clamping pulse are adjustable (CLPPOS, CLPLEN). If READD is set to ’1’ (100Hz
mode), all pulses are shortened by one half. HZOOM influences the adjustment range of
Micronas
4-36